Fieldbus Extender for DeviceNet
6Pages

Data Sheet EXTEND-A-BUS Series Fieldbus Extender for DeviceNet • Fibre optic or coaxial cabling • Star, bus or distributed-star topology • Variable data rates up to 500 kbps • Low-voltage AC- or DC-powered • Panel-mount or DIN-rail mount • CE Mark • RoHS compliant • Extends the length of DeviceNet networks up to 6 km • Fully DeviceNet compliant PRODUCT OVERVIEW The EXTEND-A-BUS Series can extend DeviceNet up to six kilometers — linking individual DeviceNet subnets together into a single larger network. Each EXTEND-A-BUS unit creates a DeviceNet subnet and at least two units are needed to link subnets together. The data rate on each subnet can differ from those of other subnets. DeviceNet identifiers or MAC IDs cannot be duplicated on any of the subnets. Each EXTEND-A-BUS pair is best viewed as an extension cord. A unit does not consume a permanent MAC ID, therefore it is transparent to the network. The backbone side of the EXTEND-A-BUS must adhere to standard ARCNET® cabling rules. Companion AI ARCNET active hubs are available for extending the backbone cabling. Hubs are cascaded to achieve the maximum distance: up to 6 km when using coaxial cabling and ten active hubs or up to 4.8 km when using a fibre optic backbone and two active hubs.

Data Sheet EXTEND-A-BUS Series Network Diagrams Figure 1. Appropriate terminators are required at the ends of both the coaxial cable backbone and CAN subnets. Figure 2. A 62.5/125 μm duplex fibre optic cable is used on the -FOG model up to a maximum of 1830 meters. Figure 1. Figure 3. A maximum of eight bridges can occupy one coaxial backbone segment before an active hub is required. Use BNC “Tees” and terminators when making connections. One of each is included in the -CXB model. Figure 3. By using two AI3-CXS hubs, a distributed start topology is achieved. Note that the hub-tohub distance...

Data Sheet Side View showing DIN-rail Clip (Mounting Brackets Retracted)Front View with Mounting Brackets ExtendedPower Diagrams Redundant DC Powered AC Powered with Grounded Secondary AC Powered with Battery Backup

EXTEND-A-BUS SeriesSpecifications Electrical Input voltage Input power Input frequency Functionality Data latency 1 ms typical per bridge pair Regulatory Compliance CE Mark; CFR 47, Part 15 Class A DeviceNet Port Connection Network Connector (Female Contacts) CAN H white drain bare Device Connector (Male Contacts) TD960801-0DB Page 4

Data Sheet DeviceNet Port Backbone Port Compliance DeviceNet ARCNET Volume 1, Release 2.0 ANSI/ATA 878.1 Data rate 125 kbps, 250 kbps, 2.5 Mbps CAN status Link status Module status/network status Reconfiguration status/activity status Optically-isolated 82C251 -CXB model: transformer-coupled -FOG model: 850 nm duplex fibre optic DeviceNet Thick -CXB model: RG-62/u coaxial -FOG model: 62.5/125 pm duplex fibre optic Maximum segment or subnet distance -CXB model: 305 m (1000 ft) -FOG model: 1830 m (6000 ft) (optical power budget: 10.4 dB) Maximum number of...

Data Sheet EB/DNET-CXB EXTEND-A-BUS for DeviceNet with coaxial bus backboneEB/DNET-FOG EXTEND-A-BUS for DeviceNet with fibre optic backbone Accessories Model Description AI-XFMR Wall-mount plug-in transformer, 120 VAC (nom) input/24 VAC (nom) output AI-XFMR-E Wall-mount plug-in transformer, 230 VAC (nom) input/24 VAC (nom) output AI-DIN DIN-rail mounting kit BNC-T BNC "T" connector Contemporary Controls, ARC Control, ARC DETECT, EXTEND-A-BUS and CTRLink are registered trademarks or trademarks of Contemporary Control Systems, Inc. Specifications are...